Apple Shake 4 - Manual (Page 622)

622 Chapter 23 Color Correction
To load a sampled color into a Color control in the Parameters tab:
1 In the Parameters tab, click the Color control for the color parameter you want to adjust.
A yellow outline appears around the edge of the Color control, and the Color Picker
opens.
2 Select a new color in any of the ways described above (using the ColorWheel or
dragging over the image in the Viewer, for example).
Note: If you’re sampling a color from an image that has no color-correction nodes
applied, turn on Sample From Viewer in the Color Picker.
If you’re sampling a color from an image that has already been color-modified (for
example, an image modifed by a Mult node), then the real-time update of the color
correction interferes with onscreen selection of color, causing an unwanted feedback
loop. To avoid this, turn on Use Source Buffer instead, and color values are taken from
the original image node, not the currently selected node.
This is especially useful when doing scrubs for keying nodes, since it allows you to pick
color values from the prekeyed image.
Notice that the color sampling swatches above the ColorWheel update as you drag.
3 Click one of the color sampling swatches to load its color into the selected Color
control (in the Parameters tab).
The color sampling swatches reset themselves each time you click in the Viewer. If
you’ve accidentally dragged a region and the Min and Max values are unsatisfactorily
set, simply click in the Viewer again to choose new values in all swatches.
You can also load colors into the Parameters tab using the Palette, located under the
ColorWheel. The Palette can also be used to store colors that you use repeatedly in your
composition.